[Resource Topic] 2009/300: Universally Composable Contributory Group Key Exchange

Welcome to the resource topic for 2009/300

Title:
Universally Composable Contributory Group Key Exchange

Authors: M. Choudary Gorantla, Colin Boyd, Juan Manuel Gonzàlez Nieto

Abstract:

We treat the security of group key exchange (GKE) in the universal composability (UC) framework. Analyzing GKE protocols in the UC framework naturally addresses attacks by malicious insiders. We define an ideal functionality for GKE that captures contributiveness in addition to other desired security goals. We show that an efficient two-round protocol securely realizes the proposed functionality in the random oracle model. As a result, we obtain the most efficient UC-secure contributory GKE protocol known.

ePrint: https://eprint.iacr.org/2009/300

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